Chappee NXR3 Installation Manual page 8

3 . 3 Tightening the sections
To tighten the sections, a set of assembly bars is necessary.
It comprises:
For 4- to 7- section boiler:
- 2 assembly bars, length = 1.60 m (A),
- 2 fixed plates with stop-ring (B),
- 2 mobile plates with ball nut (C),
- 1 ratchet wrench.
This set is not part of normal supplies.
For 8- and 9- section boilers:
- Same as above,
- 2 bar extensions, length = 950 mm.
Or PARCEL N° 1 + PARCEL N° 2
121 Run = 245
Nut Mobile plate C
FRONT
Bar
Nbr. of elements
4 to 7 A
A + D
8 to 9
Stop-ring
REAR
section
Positioning aid
MID
Nut
section
Ref. : CH - 1249 - A - 2
160 Step = 190
L dimension l dimension
1600 1355
2550 2305
A
Assembly
marking
B
Assembly
C
marking
Wrench
Fig. 8
1) Withdraw the plates' alignment screws,
2) Place an (A) installation bar in each row of nipples,
3) Mount, on each bar, at the rear, a plate with (B) stop-
ring,
4) Mount at the front the (C) plates with tightening nut,
after having lubricated the thread,
5) Align the plates,
6) tighten the screw alternately by 1/2 a turn each, taking
care to avoid fan assembly.
Proceed with tightening until the sections touch, and
check it by looking in the firebox and the upper
"flue-ways".
L
l max.
assembly bar A
7) Assemble the other sections (1 by 1) in the same way,
while moving the wooden blocks alternately as you go
towards the front,
8) Do not loosen the assembly bars and position the 4
assembly linkages. Tighten them properly, leaving an
equal length at each end to secure the casing's cross
members, and if necessary the adjustable legs,
9) Loosen and take the installation bars off,
10) proceed with the boiler assembly.
NOTE: If it were necessary to dismantle one of the
boiler's sections, and to avoid damaging the
leaktightness gorges, it is imperative, when dismantling
the sections, to place the chisel at the level of the
spacing pads (E) provided in the upper part (see
figure 5).
8
Extension D
Take alignment screws off
Fixed plate B
Fig. 7
54 70
BACK
Stop-
ring